I found the book in question in the children’s fiction shelves of an army post library in the Panama Canal Zone in 1964 or 1965.
The story centered around two girls who explored an old abandoned house in their neighborhood. The house was supposedly haunted; from time to time the “tap-tap-tap” sound of a cobbler’s hammer repairing shoes could be heard.
Eventually, a boy they know decides to enter the house too, but they decide to avoid him and are able to do so by using the numerous trap doors in the house to move around undetected.